CN109553264B - Sludge drying machine - Google Patents
Sludge drying machine Download PDFInfo
- Publication number
- CN109553264B CN109553264B CN201910100755.1A CN201910100755A CN109553264B CN 109553264 B CN109553264 B CN 109553264B CN 201910100755 A CN201910100755 A CN 201910100755A CN 109553264 B CN109553264 B CN 109553264B
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- Prior art keywords
- cylinder
- sludge
- wall
- plate
- volute
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- 239000010802 sludge Substances 0.000 title claims abstract description 84
- 238000001035 drying Methods 0.000 title claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000008602 contraction Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 6
- 238000007790 scraping Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a sludge dryer, which is characterized in that sludge is spread on the wall of a heating cylinder to be dried and then cut and rubbed into a spiral conveying blade, so that the separation of a transmission part and a sludge drying part is realized, the blockage phenomenon of a sludge holding shaft is prevented, the opening and closing frequency of a volute blade can be changed according to the unnecessary drying moisture content, and the drying degree and efficiency of the sludge are improved; the technical scheme for solving the problem is that the device comprises a cylinder, wherein two ends of the cylinder are provided with closed baffles, and the cylinder is provided with a through groove; a spiral blade is arranged in the cylinder, a transmission shaft is arranged in the spiral blade, a volute plate is arranged on the outer side of the spiral blade, a protrusion is arranged on the outer wall of the volute plate, a blade is arranged on the protrusion in the direction opposite to the rotating direction, electromagnets are arranged on the volute plate and the inner wall of the cylinder, and a spring is arranged on the inner wall of the volute plate; the invention has novel conception, realizes the high-efficiency drying of the sludge by a mode of troweling, drying, scraping, crushing and conveying the sludge, avoids the phenomenon of shaft sticking of gelled sludge by dry-wet separation, simultaneously controls the sludge conveying electromagnetically to control the drying rate, and improves the working energy efficiency.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge dryer.
Background
Sludge is an extremely complex heterogeneous body with high water content, which is composed of organic matters, bacteria, inorganic particles, colloids and the like, and is mostly generated when municipal wastewater and factory wastewater are treated. With the development of cities, the sludge yield is increased. Sludge treatment is a process of performing reduction, stabilization and innocent treatment on sludge, wherein reducing the water content of the sludge is an important method for making the sludge harmless.
The existing sludge drying technology mostly adopts a high-temperature stirring mode to discharge moisture in sludge, and the method can pass through a sticky phase region during drying to generate a sludge shaft sticking phenomenon, so that a sludge treatment part is blocked, a blade is difficult to clean, the contact area with a high-temperature part is small, the water removal rate is low, and the efficiency is low.
Therefore, the invention designs the high-efficiency sludge dryer which can dry and flake the sludge and completely separate the conveying and the drying.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a sludge dryer which can be used for spreading sludge on the wall of a heating cylinder for drying and then scraping the sludge into a spiral conveying blade, so that the separation of a transmission part and a sludge drying part is realized, and the phenomenon of blocking of a sludge seizing shaft is prevented. Meanwhile, the opening and closing frequency of the volute blades can be changed according to the requirement of drying moisture content, and the sludge drying degree and efficiency are improved.
The technical scheme for solving the problem is that the device comprises a cylinder which is transversely placed, wherein two ends of the cylinder are provided with a closed baffle plate, and the wall of the upper end of the cylinder is provided with a through groove along the axial lead direction of the cylinder; a spiral blade with the same axis as the cylinder is arranged in the cylinder, a transmission shaft for driving the spiral blade to rotate is arranged on the axis of the spiral blade, and one end of the spiral blade extends out of the sealing baffle; the outer side of the spiral blade is connected with a volute plate, the position with the smallest radius of the volute plate is connected with the outer edge of the spiral blade, the bent plate with the largest radius on the volute plate is hinged with the adjacent bent plate, and the position with the largest radius of the volute plate is spaced from the inner wall of the cylinder; the inner wall of the cylinder and the outer wall of the volute plate form a drying cavity, and the inner wall of the volute plate and the spiral blade form a conveying cavity; the outer wall of the volute casing plate is provided with a bulge along the axial lead direction of the cylinder, the length of the bulge is the same as that of the axial lead of the inner wall of the cylinder, the bulge has elasticity, each bulge is provided with a blade fixed on the volute casing plate in the direction opposite to the rotation direction, the length of the blade is the same as that of the bulge, and the distance between the bulge and the inner wall of the cylinder and the distance between the blade and the inner wall of the cylinder can be adjusted; the largest radius part of the volute plate and the inner wall of the cylinder are provided with electromagnets, the inner wall of the bending plate with the largest radius of the volute plate is provided with a spring with a sleeve, one end of the spring is connected to the inner wall of the bending plate with the largest radius of the volute plate, the other end of the spring extends to the axial lead direction of the spiral blade and is connected to the outer side of the bending plate of the volute plate, and the electromagnets are matched with the spring to control the conveying cavity to be opened or closed.
The invention has novel conception, realizes the high-efficiency drying of the sludge by a mode of troweling, drying, scraping, crushing and conveying the sludge, avoids the phenomenon of shaft sticking of gelled sludge by dry-wet separation, simultaneously controls the sludge conveying electromagnetically to control the drying rate, and improves the working energy efficiency.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a cross-sectional profile view of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
FIG. 4 is a cross-sectional view taken along line B-B of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in the attached drawings 1-4, the invention comprises a cylinder 1 which is transversely arranged, two ends of the cylinder 1 are provided with closed baffles 2, and the wall of the upper end of the cylinder 1 is provided with a through groove along the axial lead direction of the cylinder; a spiral blade 3 with the same axis as the cylinder 1 is arranged in the cylinder 1, a transmission shaft 5 for driving the spiral blade 3 to rotate is arranged on the axis of the spiral blade 3, and one end of the spiral blade 3 extends out of the closed baffle 2; the outer side of the spiral blade 3 is connected with a volute plate 4, the position with the minimum radius of the volute plate 4 is connected with the outer edge of the spiral blade 3, the bent plate with the maximum radius on the volute plate 4 is hinged with the adjacent bent plate, and the position with the maximum radius of the volute plate 4 is spaced from the inner wall of the cylinder 1; the inner wall of the cylinder 1 and the outer wall of the volute plate 4 form a drying cavity 11, and the inner wall of the volute plate 4 and the spiral blade 3 form a conveying cavity 12; the outer wall of the volute plate 4 is provided with a protrusion 6 along the axial lead direction of the cylinder 1, the length of the protrusion 6 is the same as that of the inner wall of the cylinder 1, the protrusion 6 has elasticity, each protrusion 6 is provided with a blade 7 fixed on the volute plate 4 in the direction opposite to the rotation direction, the length of the blade 7 is the same as that of the protrusion 6, and the distance between the protrusion 6 and the blade 7 and the inner wall of the cylinder 1 can be adjusted; the maximum radius of the volute plate 4 and the inner wall of the cylinder 1 are provided with electromagnets 8, the inner wall of the bending plate with the maximum radius of the volute plate 4 is provided with a spring 10 with a sleeve 9, one end of the spring 10 is connected to the inner wall of the bending plate with the maximum radius of the volute plate 4, the other end of the spring extends to the axial lead direction of the spiral blade 3 and is connected to the outer side of the bending plate of the volute plate, and the electromagnets 8 and the spring 10 are matched to control the conveying cavity to be opened or closed.
In order to ensure that the water evaporation efficiency is high and the feeding is convenient when the sludge is dried, the area of the through groove at the upper end of the cylinder wall of the cylinder 1 is not less than one fifth of the circumference of the cylinder wall.
In order to adjust the distance between the protrusion 6 and the blade 7 to the inner wall of the cylinder 1, the protrusion 6 and the blade 7 are of different specifications and are detachably mounted on the volute plate 4, such as by screwing.
The protrusion 6 and the blade 7 form a group of claying structures, at least more than 2 groups of claying structures are arranged on the outer wall of the volute plate 4 for uniform claying, when sludge slides off the inner wall of the cylinder 1, the sludge cannot directly fall into the bottom of the cylinder 1, but falls onto the next group of protrusion 6 and blade 7 and is again screeded on the inner wall of the cylinder 1; and set up multiunit claying structure, can solve the processing of the mud that the water content is big simultaneously again.
In order to facilitate the feeding and the opening and closing of the conveying cavity 12, the volute casing plate 4 is formed by more than 4 bending plates.
In order to control the opening and closing of the conveying cavity 12, the electromagnet 8 is a repulsion electromagnet or an attraction electromagnet, when the electromagnet 8 is the repulsion electromagnet, the spring 10 is a compression spring, and when the electromagnet 8 is the attraction electromagnet, the spring 10 is an extension spring; in order to match the expansion and contraction of the spring 10, the sleeve 8 has elasticity; when drying, the electromagnet 8 is electrified, the repulsion force closes the conveying cavity 12, when drying is completed, the electromagnet is closed, and the restoring force of the compression spring 10 opens the conveying cavity 12; or; during drying, the electromagnet 8 is closed, the conveying cavity 12 is closed by the force of the extension spring 10, after drying is completed, the electromagnet 8 is opened, and the conveying cavity 12 is opened by suction force; the sleeve 9 can be a metal corrugated pipe to prevent the bending plate with the largest radius from deforming.
In order to treat sludge with high viscosity, the edge of the bending plate with the largest radius of the volute plate 4, which is perpendicular to the closed baffle 2, is in a saw-tooth shape and the like, so that the attached sludge can be scraped conveniently.
In order to control the whole process of opening and closing the conveying cavity 12, the inner wall of the cylinder 1 needs to be circumferentially provided with the electromagnet 8, the electromagnet 8 can be a plurality of block-shaped magnets, the electromagnets can be uniformly arranged on the inner wall of the cylinder 1 circumferentially, and an annular magnet can be tightly attached to the inner wall of the cylinder 1.
A water pipe is arranged in the wall of a cylinder, and hot water is introduced into the water pipe to heat the inner wall of the cylinder; when the magnet 8 is a repulsive magnet and the spring 10 is a compression spring, for example, when sludge needs to be dried, the repulsive electromagnet 8 is electrified, the position with the largest radius of the volute plate is closed, namely the conveying cavity 12 is closed, at the moment, the sludge falls into the drying cavity 11 from the open position at the upper part of the cylinder 1, the transmission shaft 5 simultaneously drives the spiral blade 3 and the volute plate 4 to rotate at a low speed, the sludge is uniformly smeared on the inner wall of the cylinder 1 by the plastering lug 6 and the scraping blade 7, and the sludge is dried by heating the inner wall; after the sludge is dried to the required water content, the electromagnet 8 is powered off, the restoring force of the compression spring 10 enables the position with the largest radius of the volute plate 4 to be opened, namely the conveying cavity 12 is opened, the edge of the bent plate with the largest radius of the volute plate 4 scrapes the dried sludge adhered to the inner wall of the cylinder 1 to enter the conveying cavity 12, the sludge falling into the bottom of the cylinder 1 can also be shoveled into the conveying cavity 12 in the rotating process of the volute plate 4, the volute plate continuously rotates along the rotating direction of the volute to drive the sludge in the conveying cavity 12 to enter the spiral blade 3, and the spiral blade 3 is used for stirring the sludge dry pieces and conveying the sludge out of the conveying cavity 12 to the outside of the cylinder 1 through the closed baffle 2 on one side.
Since the water content of the sludge is high and the sludge is easy to slide off the inner wall of the cylinder 1, more than 2 pairs of the projections 6 and the blades 7 are needed, so when the sludge slides off, the sludge falls off the projections 6 at the lower part and is leveled on the inner wall of the cylinder 1 again along with the movement of the transmission shaft 5; the bulge 6 has elasticity, the blade 7 is rigid, the bulge 6 and the blade 7 are matched to process the uniform and flexible mud smearing of the elastic bulge 6 of the sludge, the rigid blade 7 scrapes off the redundant sludge to prevent the sludge from being blocked, and the damage to parts can be reduced when the sludge is processed.
Because the environment is poor during sludge drying, the electromagnet 8 is not easy to be arranged at the position where the volute casing plate 4 is close to the spiral blade 3, the spring 10 is arranged at the position, and the separation of the drying cavity 11 and the conveying cavity 12 is controlled by the cooperation of the spring 10 and the electromagnet 8, so that the invention can be used for a long time without high-frequency maintenance.
The closing frequency of the transfer cavity 12 can be adjusted according to the water content of the sludge after drying, if the water content is low, the switching frequency of the controllable electromagnet 8 is low, namely the switching frequency of the transfer cavity 12 is low, and the sludge drying time is long, and if the water content is high, the switching frequency of the controllable electromagnet 8 is high, namely the switching frequency of the transfer cavity 12 is high, and the sludge drying time is short.
In the practical operation of the invention, the electromagnet 8 may be interfered by the heating of the inner wall of the cylinder 1, so that the electromagnet 8 can be designed to be provided with a ring-shaped magnet at the head and the tail of the cylinder 1 along the axial lead direction, thereby reducing the interference of the electromagnet by heat.
The transmission shaft 5 can simultaneously drive the volute plate 4 and the spiral blade 3 to rotate in the same direction, the volute plate 4 divides the cavity of the cylinder 1 into a conveying cavity 12 and a drying cavity 11, the outer side of the volute plate 4 and the inner wall of the cylinder 1 are matched with each other to dry sludge in the drying cavity 12, and a vortex structure in the volute plate 4 is matched with the spiral blade 3 to convey the dried sludge out of the cylinder 1 from the conveying cavity 12.
Due to the existence of the volute plate 4 and the openable structure, only dried sludge can enter the conveying cavity 12 and only dried sludge contacts the transmission shaft 5, and dry and wet sludge is isolated, so that the phenomenon of sticking of gelled sludge to affect the drying efficiency in the conveying process is avoided, and the driving consumption and the space occupation are reduced.
If the sludge to be dried has a low water content, the sludge may have a large sludge block when entering the transfer chamber 12, and the helical blade 3 may crush the large sludge block during the transfer of the sludge.
The invention has novel conception, realizes the high-efficiency drying of the sludge by the way of trowelling, drying, scraping, smashing and conveying the sludge, avoids the phenomenon of shaft sticking of gelled sludge by dry-wet separation, simultaneously controls the sludge conveying electromagnetically to control the drying rate, and improves the working energy efficiency.
Claims (7)
1. A sludge dryer comprises a cylinder (1) which is transversely placed, wherein two ends of the cylinder (1) are provided with a sealing baffle (2), and the wall of the upper end of the cylinder (1) is provided with a through groove along the axial lead direction of the cylinder; the device is characterized in that a spiral blade (3) which has the same axis as the cylinder (1) is arranged in the cylinder, a transmission shaft (5) which drives the spiral blade (3) to rotate is arranged on the axis of the spiral blade (3), and one end of the spiral blade (3) extends out of the closed baffle (2); the outer side of the spiral blade (3) is connected with a volute plate (4), the minimum radius part of the volute plate (4) is connected with the outer edge of the spiral blade (3), the bending plate with the maximum radius on the volute plate (4) is hinged with the adjacent bending plate, and the maximum radius part of the volute plate (4) is spaced from the inner wall of the cylinder (1); the inner wall of the cylinder (1) and the outer wall of the volute plate (4) form a drying cavity (11), and the inner wall of the volute plate (4) and the spiral blade (3) form a conveying cavity (12); the outer wall of the volute plate (4) is provided with a protrusion (6) along the axial lead direction of the cylinder (1), the length of the protrusion (6) is the same as the axial lead length of the inner wall of the cylinder (1), the protrusion (6) has elasticity, each protrusion (6) is provided with a blade (7) fixed on the volute plate (4) in the direction opposite to the rotation direction, the length of the blade (7) is the same as that of the protrusion (6), and the distance between the protrusion (6) and the inner wall of the cylinder (1) can be adjusted; the maximum radius of the volute plate (4) and the inner wall of the cylinder (1) are provided with electromagnets (8), the bending plate inner wall with the maximum radius of the volute plate (4) is provided with a spring (10) with a sleeve (9), one end of the spring (10) is connected to the bending plate inner wall with the maximum radius of the volute plate (4), and the other end of the spring (10) extends to the axial lead direction of the spiral blade (3) and is connected to the outer side of one bending plate of the volute plate.
2. The sludge dryer as claimed in claim 1, wherein the projections (6) and the blades (7) have different specifications and are mounted on the volute plate (4) by means of screw fastening.
3. The sludge dryer as claimed in claim 1, wherein a set of claying structures is formed by the protrusion (6) and the blade (7), and more than 2 sets of claying structures are arranged on the outer wall of the volute plate (4).
4. The sludge drying machine of claim 1, wherein the volute plate (4) is formed by more than 4 bent plates.
5. The sludge drying machine according to claim 1, wherein the electromagnet (8) is a repulsion electromagnet or a suction electromagnet, when the electromagnet (8) is the repulsion electromagnet, the spring (10) is a compression spring, and when the electromagnet (8) is the suction electromagnet, the spring (10) is an extension spring; in order to match the extension and contraction of the spring (10), the sleeve (9) has elasticity.
6. The sludge drying machine according to claim 1, wherein the edge of the bending plate with the largest radius of the volute plate (4) perpendicular to the closing baffle (2) is arranged in a zigzag shape.
7. The sludge drying machine of claim 1, wherein the inner wall of the cylinder (1) is provided with an electromagnet (8) on the circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100755.1A CN109553264B (en) | 2019-01-31 | 2019-01-31 | Sludge drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910100755.1A CN109553264B (en) | 2019-01-31 | 2019-01-31 | Sludge drying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109553264A CN109553264A (en) | 2019-04-02 |
| CN109553264B true CN109553264B (en) | 2021-08-20 |
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ID=65874134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910100755.1A Active CN109553264B (en) | 2019-01-31 | 2019-01-31 | Sludge drying machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109553264B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2501005Y (en) * | 2001-09-24 | 2002-07-17 | 张兆奇 | Drying equipment for mud material |
| CN205222967U (en) * | 2015-10-30 | 2016-05-11 | 山东公用北湖污水处理有限公司 | Sludge drying equipment |
| CN107162380A (en) * | 2017-07-18 | 2017-09-15 | 无锡绿麦环保科技有限公司 | Disc type anti-explosion safety desiccation machine based on dust blowing adjustable angle |
| CN109179943A (en) * | 2018-11-06 | 2019-01-11 | 韩军奇 | A kind of working method of urban sludge drying process device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8273165B2 (en) * | 2009-12-11 | 2012-09-25 | Micronic Technologies, LLC | Compacted air flow rapid fluid evaporation system |
| US9371356B2 (en) * | 2013-06-27 | 2016-06-21 | Aicardo Roa-Espinosa | Separation of biocomponents from manure |
-
2019
- 2019-01-31 CN CN201910100755.1A patent/CN109553264B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2501005Y (en) * | 2001-09-24 | 2002-07-17 | 张兆奇 | Drying equipment for mud material |
| CN205222967U (en) * | 2015-10-30 | 2016-05-11 | 山东公用北湖污水处理有限公司 | Sludge drying equipment |
| CN107162380A (en) * | 2017-07-18 | 2017-09-15 | 无锡绿麦环保科技有限公司 | Disc type anti-explosion safety desiccation machine based on dust blowing adjustable angle |
| CN109179943A (en) * | 2018-11-06 | 2019-01-11 | 韩军奇 | A kind of working method of urban sludge drying process device |
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|---|---|
| CN109553264A (en) | 2019-04-02 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Huilin Inventor after: Wang Guoping Inventor after: He Yangzhou Inventor after: Han Huiqiao Inventor before: Han Huiqiao |
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| CB03 | Change of inventor or designer information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210730 Address after: 314500 No. 296 Huaye Road, Fengming Street, Tongxiang City, Jiaxing City, Zhejiang Province Applicant after: Zhejiang Zhiyuan Environmental Technology Co.,Ltd. Address before: 450000 Shuangqiao sludge treatment plant, 200m east of North Fourth Ring Road, Huiji District, Zhengzhou City, Henan Province Applicant before: Han Huiqiao |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A sludge dryer Effective date of registration: 20211018 Granted publication date: 20210820 Pledgee: Zhejiang Tongxiang rural commercial bank Limited by Share Ltd. Feng Ming sub branch Pledgor: Zhejiang Zhiyuan Environmental Technology Co.,Ltd. Registration number: Y2021330001838 |
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| CP03 | Change of name, title or address |
Address after: 314500 Building 1, 3, 4 and 5, No. 296 Huaye Road, Fengming street, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Zhiyuan Environmental Technology Co.,Ltd. Address before: 314500 No. 296 Huaye Road, Fengming Street, Tongxiang City, Jiaxing City, Zhejiang Province Patentee before: Zhejiang Zhiyuan Environmental Technology Co.,Ltd. |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230517 Granted publication date: 20210820 Pledgee: Zhejiang Tongxiang rural commercial bank Limited by Share Ltd. Feng Ming sub branch Pledgor: Zhejiang Zhiyuan Environmental Technology Co.,Ltd. Registration number: Y2021330001838 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |